/*
 * BEEM is a videoconference application on the Android Platform.
 * Copyright (C) 2009 by Frederic-Charles Barthelery,
 * Jean-Manuel Da Silva,
 * Nikita Kozlov,
 * Philippe Lago,
 * Jean Baptiste Vergely,
 * Vincent Veronis.
 * This file is part of BEEM.
 * BEEM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * BEEM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with BEEM. If not, see <http://www.gnu.org/licenses/>.
 * Please send bug reports with examples or suggestions to
 * contact@beem-project.com or http://dev.beem-project.com/
 * Epitech, hereby disclaims all copyright interest in the program "Beem"
 * written by Frederic-Charles Barthelery,
 * Jean-Manuel Da Silva,
 * Nikita Kozlov,
 * Philippe Lago,
 * Jean Baptiste Vergely,
 * Vincent Veronis.
 * Nicolas Sadirac, November 26, 2009
 * President of Epitech.
 * Flavien Astraud, November 26, 2009
 * Head of the EIP Laboratory.
 */
package com.beem.project.beem.service;

import android.content.ContentResolver;
import android.content.Context;

import android.database.Cursor;

import android.net.Uri;

import com.beem.project.beem.providers.AvatarProvider;
import com.beem.project.beem.smack.avatar.AvatarCache;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * An implementation of an AvatarCache which store the data of the filesystem.
 */
public class BeemAvatarCache implements AvatarCache {

	private static final String TAG = BeemAvatarCache.class.getSimpleName();

	private Context mContext;
	private ContentResolver mContentResolver;

	/**
	 * Create a BeemAvatarCache.
	 * 
	 * @param ctx
	 *            The android context of the cache.
	 */
	public BeemAvatarCache(final Context ctx) {
		mContext = ctx;
		mContentResolver = mContext.getContentResolver();
	}

	@Override
	public void put(String key, byte[] data) throws IOException {
		Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
		OutputStream os = new BufferedOutputStream(mContentResolver.openOutputStream(uri));
		try {
			os.write(data);
		} finally {
			os.close();
		}
	}

	@Override
	public void put(String key, InputStream in) throws IOException {
		Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
		OutputStream os = new BufferedOutputStream(mContentResolver.openOutputStream(uri));
		try {
			byte[] data = new byte[1024];
			int nbread;
			while ((nbread = in.read(data)) != -1)
				os.write(data, 0, nbread);
		} finally {
			in.close();
			os.close();
		}
	}

	@Override
	public byte[] get(String key) throws IOException {
		Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
		InputStream is = new BufferedInputStream(mContentResolver.openInputStream(uri));
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		try {
			byte[] data = new byte[1024];
			is.read(data);
			bos.write(data);
		} finally {
			is.close();
		}
		return bos.toByteArray();
	}

	@Override
	public boolean contains(String key) {
		Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
		Cursor c = mContentResolver.query(uri, null, null, null, null);
		boolean res = c.getCount() > 0;
		c.close();
		return res;
	}
}
